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Business Segments (Tables)

3 Months Ended

Jun. 30, 2011

Business Segments

Schedule Of Business Segments Operating Results

	Three months ended
	June 30,
	2011		2010
Revenues:
Wind	$4,262		$83,006
Grid	4,796		14,203
Total	$9,058		$97,209
Three months ended
June 30,
	2011		2010
Operating (loss) income:
Wind	($24,370)		$31,339
Grid	(10,552)		(11,764)
Unallocated corporate expenses	(3,405)		(3,494)
Total	($38,327)		$16,081

Schedule Of Business Segments Assets

	June 30,		March 31,
	2011		2011
Wind	$127,360		$145,464
Grid	64,252		67,081
Corporate assets	202,050		228,664
Total	$393,662		$441,209

Customers Who Represented 10% Or More Of The Company's Total Revenues

		Three months ended  June 30,
		2011		2010
Department of Energy		17%		<10%
Doosan Heavy Industries & Construction Co Ltd.		15%		<10%
Shenyang Blower Works Group Wind Power Co.,Ltd.		13%		<10%
Sinovel Wind Co., Ltd		-%		72%

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Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

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Segment Reporting [Abstract]

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